550-33-4 9-pentofuranosyl-9H-purinato(2-) 9H-purine, 9-pentofuranosyl- InChI=1/C10H12N4O4/c15-2-6-7(16)8(17)10(18-6)14-4-13-5-1-11-3-12-9(5)14/h1,3-4,6-8,10,15-17H,2H